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  1. G

    SES light not working

    I am not an expert on this stuff. The chart says to disconnect the ECM, ign ON, and then ground 419 at ECM connector and see if SES light comes on. The ECM provides the ground. 12v comes in from ign switch via the “gage” fuse. If the light comes on when you ground it, the issue is on the ECM...
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    SES light not working

    There is a diagnostic chart for that in the emissions and drivability manual. Don’t have it handy, but it is in the reference library.
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    1990 V1500 stock-size radiator replacement

    Gotcha, thanks. Yeah, I have all the external auxiliary coolers for oil, trans, and PS
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    1990 V1500 stock-size radiator replacement

    Thanks! Any issues with fitment?
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    1990 V1500 stock-size radiator replacement

    yeah, thatd be great!
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    1990 V1500 stock-size radiator replacement

    the radiator on my 1990 v1500 burb (350tbi, standalone oem aux oil and transmission coolers) has sprung a leak. it isn't a OEM radiator, but some oversized aluminum/plastic monstrosity somebody fit in there and added a couple brackets to hold the factory shroud in place. the factory shroud...
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    blower motor intermittent?

    I had the blower motor resistor cause me intermittent blower issues last summer. first on high only, and then on other speeds. i had power at the resistor. it was intermittent and i could wiggle the resistor around and it would work sometimes. even when the high speed is connected, i think the...
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    Dakota digital users, fuel gauge

    i think the sender grounds back by the tank? might check there as a starting point.
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    Where is the ALT idiot light on 1988 burb?

    My 90 has it lower left under the voltmeter
  10. G

    Oil in throttle body

    Is it oil or fuel? If you are getting oil there, I’d be looking at the PCV valve in the other valve cover and its associated plumbing to the TBI. The crank case must be getting pressurized somehow to do that , as that side is just pulling fresh air into the valve cover to balance out what the...
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    LED bulbs in gauge cluster

    Some LEDs are polarity specific. You might need to swap the bulbs 180 in the cluster
  12. G

    HELP .1987 v1500 runs rough under load

    Might be easiest to do that and watch values while driving by back probing at the ECM harness.
  13. G

    HELP .1987 v1500 runs rough under load

    it is easy to disconnect the EGR valve from the solenoid and take it for a spin. it may set a code 32, just be aware of that
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    HELP .1987 v1500 runs rough under load

    plugged exhaust or maybe the fuel pressure cant handle the engine load are the next things that come to mind. did the check engine light come on with O2 sensor unplugged?
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    HELP .1987 v1500 runs rough under load

    next thing id check is the ECM ground by the thermostat housing and check all the ECM connectors at the components to make sure the connectors are good and the sensors look ok where the connectors plug in - IAC, TPS MAP, ICM, O2 sensor, EGR solenoid, coil, CTS. might also check your battery...
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    HELP .1987 v1500 runs rough under load

    when you had the timing checked, did you check it with the EST wire unplugged? timing should be 0 with it unplugged. start truck, warm it up, unplug EST, check timing with a light on no 1 wire, turn engine off, and reconnect EST.
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    HELP .1987 v1500 runs rough under load

    if it runs better cold than warm, the biggest change is when it is warmed up, the ECM is using the O2 sensor to adjust fueling in "Closed loop" could be the O2 is getting flakey, or could be it has bad data for some other reason (plugged cat, misfire, etc) and the O2 feedback to the ECM is...
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    Gage/idle fuse blows when key on

    almost the exact same situation as my 1990 in the linked post above. look for a. area where that wire is held in place by a bracket by the transmission. that ks where it was on my 1990. look at night with a flash light. the rub through will be shiny and reflective wire
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    My new to me 01' SSEI

    I always liked those cars as well. have fun with it and keep this updated!
  20. G

    Intermittent shutoff

    that must have been the price for a full distributor. I like AC Delco modules and have been rocking one for several years
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    Intermittent shutoff

    Without a CEL to go by, that would also be my guess. Replace with an AC Delco part vs parts house.
  22. G

    Need part number on dash light holder

    PC194 I think...
  23. G

    Need part number on dash light holder

    the 90 is a bulb and holder all in one part. the bulb isn't a replaceable item by itself.
  24. G

    Knock Sensor

    Then I would just leave it be!
  25. G

    Knock Sensor

    The ECM self tests it. If it doesn’t see knock counts during the self test, it will throw a code. No reason to mess with it if it isn’t throwing a code.

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